Add RFlink cover docs

source/_components/cover.rflink.markdown

@@ -0,0 +1,58 @@
+---
+layout: page
+title: "RFLink Cover"
+description: "Instructions how to integrate RFXtrx covers into Home Assistant."
+date: 2016-08-24 14:30
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: rflink.png
+ha_category: Cover
+ha_release: 0.55
+---
+
+The `rflink` cover platform supports devices that use [RFLink gateway firmware](http://www.nemcon.nl/blog2/), for example the [Nodo RFLink Gateway](https://www.nodo-shop.nl/nl/21-rflink-gateway). RFLink gateway is an Arduino firmware that allows two-way communication with a multitude of RF wireless devices using cheap hardware (Arduino + transceiver).
+
+First you have to set up your [rflink hub](/components/rflink/).
+
+The RFLink component does not know the difference between a `switch` and a `light`. Therefore all switchable devices are automatically added as `light` by default.
+
+RFLink switch/light/cover ID's are composed of: protocol, id, switch. For example: `newkaku_0000c6c2_1`.
+
+Once the ID of a switch is known it can be used to configure it as a switch type in HA, for example to add it to a different group, hide it or configure a nice name.
+
+To add RFLink to your installation, add the following to your Home Assistant `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+cover:
+  platform: rflink
+  device_defaults:
+    fire_event: true
+    signal_repetitions: 2
+  devices:
+    newkaku_0000c6c2_1:
+      name: Ceiling fan
+    conrad_00785c_0a:
+      name: Motion sensor kitchen
+
+```
+
+Configuration variables:
+
+- **devices** (*Optional*): A list of devices with their name to use in the frontend.
+- **device_defaults**: (*Optional*)
+  - **fire_event** (*Optional*): Set default `fire_event` for RFLink switch devices (see below).
+  - **signal_repetitions** (*Optional*): Set default `signal_repetitions` for RFLink switch devices (see below).
+
+Device configuration variables:
+
+- **name** (*Optional*): Name for the device, defaults to RFLink ID.
+- **aliases** (*Optional*): Alternative RFLink ID's this device is known by.
+- **fire_event** (*Optional*): Fire an `button_pressed` event if this device is turned on or off (default: False).
+- **signal_repetitions** (*Optional*): Repeat every RFLink command this number of times (default: 1)
+- **group** (*Optional*): Allow switch to respond to group commands (ALLON/ALLOFF). (default: yes)
+- **group_aliases** (*Optional*): `aliases` which only respond to group commands.
+- **no_group_aliases** (*Optional*): `aliases` which do not respond to group commands.
+